Adjustment of Status - I-485

I was scheduled for second interview at Atlanta FO after my I-601 was approved. It was a bad one as the officer was saying he did not believe me that the company I work for is legit. Mine is Emplyoment Based. He said he would send an RFE if he has any more questions since I had a very big file and he will need to study my case. But at the end he did mention that my medical was expired and when I asked him if I need to redo my medical, he said to wait for RFE as he did not want me to waste money for me and my spouse on medical if my case gets denied. But the strange thing is my status changed to RFE the very next day and the the only RFE I received in mail was for new medical. So don't know if he was just trying scare me or what. But my wife did see at the interview as she was sitting beside me, that the officer did scan some documents that had mentioned approved before turning his computer off. So lets see what happens. Have submitted my medical. Anyone experienced something like this.